JP2008050777A - Column and beam jointing fitting and column and beam joint structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensively manufacturable column and beam jointing fitting capable of jointing a beam with a column by simple work at construction site for a wooden building and to provide a column and beam joint structure using this jointing fitting. <P>SOLUTION: A metallic cylindrical member 81 is supported by opposing to an upper face of the beam 2 and making its axial line vertical and has a cross section contracted part formed by contracting cross section by drawing in an end part on a side where the cylindrical member opposes to the upper face of the beam. A bolt 82 is inserted into the cylindrical member, and its head part is locked in the cross section contracted part on an inner side of the cylindrical member. A tip part of the bolt protrudes from an end face having contracted cross section and is fixed on the beam. On the other hand, a hole 32 is provided in the direction of axial line from an end face of the column 3, and the cylindrical member is inserted into this hole. A pin 9 is inserted into a lateral hole 31 provided in the direction of substantially right angle with an axial line of the column from a side face of the column and is locked in the cylindrical member to prevent the cylindrical member from slipping out of the column. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a structure for joining columns and beams in a wooden building and a joint fitting used therefor, and more particularly to a structure and joint fitting for joining an end face of a pillar to the upper or lower surface of a beam.

  In wooden structures, when a column is erected on a horizontal member such as a beam, many structures are used that can resist the tensile force, that is, the force that pulls out the column, by striking metal fittings on both sides. . On the other hand, it is thought that a structure in which the tensile force and shear force in the axial direction of the column are transmitted near the central axis of the column is desirable, so a bracket is installed to transmit the shear force and tensile force to the center position of the column. The joining structure to be performed is also disclosed in Patent Document 1 and Patent Document 2.

  In the structure disclosed in Patent Document 1, a hole having a circular cross section is cut in the vertical direction from the upper surface or the lower surface of the beam, and a cylindrical fitting (pipe pin) is inserted into the hole. And the tip of this metal fitting is projected from the upper or lower surface of the beam, and the column and the beam are joined by inserting the tip of the cylindrical metal fitting into the same hole cut in the end face of the column It has become. Pins are inserted from the side surfaces of the columns and the beams, and are inserted into the cylindrical metal fittings and fixed so that the cylindrical metal fittings and the columns and the cylindrical metal fittings and the beams do not come out. In such a structure, the tensile force and the shearing force act on the center of the column, and the force is effectively transmitted to improve the proof stress during an earthquake or the like.

In the column beam connection structure disclosed in Patent Document 2, as shown in FIG. 9, a large-diameter screw member 104 is screwed into the beam 102 in the vertical direction. Screw holes are provided in the direction. The joint fitting 108 is fixed to the beam 102 by screwing into the screw hole. The joint fitting 108 includes a cylindrical body 181 and a bolt 182 that is inserted inside and locked to the cylindrical body 181, and has a tip end screwed into the screw hole of the screw member 104. Thus, the cylindrical body 181 is fixed in the vertical direction. A vertical hole 131 is provided on the end face of the pillar 103, and the cylindrical body 181 is fitted into the hole, and the engaging pin 109 inserted so as to penetrate the cylindrical body 181 from the side surface of the pillar 103 is used to form the pillar 103. 103 and the cylindrical body 181 are locked. Thereby, the pillar 103 and the beam 102 are firmly joined via the joining fitting 108 and the screw member 104.
JP 2003-13503 A JP 2006-118254 A

However, the conventional joint structure and joint fitting as described above have the following problems that are desired to be improved.
In the connection structure described in Patent Document 1, it is necessary to carefully insert a cylindrical metal fitting at an accurate position with respect to both the column and the beam. In other words, the cylindrical metal fitting is provided with a through-hole for inserting the engaging pin, and must be inserted with the position exactly aligned with the horizontal hole for pin insertion provided in the column or beam. . For this reason, careful work is required at the site where the building is constructed, and the work efficiency is deteriorated. In addition, when a cylindrical metal fitting was inserted into the base or torso, and a pillar was erected on this, the floor or exterior material was removed when attempting to remove the cylindrical metal fitting during expansion or reconstruction. It may not be possible to remove the cylindrical fitting unless it is later, and the cost of expansion and reconstruction is high and not reasonable.

On the other hand, in the column-beam joint structure described in Patent Document 2, the joint fitting 108 can be easily attached to the beam 102 in advance. Further, after the pillar 103 is removed in the case of performing extension or reconstruction, the joint fitting 108 can be easily removed by loosening the bolt 182 in the cylindrical body 181, so that the extension or reconstruction can be easily performed.
However, the cylindrical body 181 of the joint fitting 108 has an end plate attached to one end by welding, and a bolt 182 is inserted into a hole provided in the end plate so that the head is locked to the end plate. It has become so. Manufacture of the cylindrical body 181 including such a welded part has a problem that the number of steps increases and the manufacturing cost increases.

  The invention according to the present application has been made in view of the circumstances as described above, and the purpose thereof is to manufacture a beam and a column with a simple operation at a construction site of a wooden building. It is an object to provide a low-cost joint fitting and a column beam joint structure using the joint fitting.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a joint fitting for joining a wooden column and a beam, and is inserted into a hole provided in an axial direction from an end surface of the column, A cylindrical member having a cross-sectional reduced portion whose cross-section is reduced by drawing at the end on the end surface side of the column, and the head is locked to the cross-sectional reduced portion inside the cylindrical member, and the end surface of the column A bolt in which a tip projecting from the bolt is fixed to the beam; and the cylindrical shape inserted into a side hole provided in a direction substantially perpendicular to the axis of the column from a side surface of the column and inserted into the hole of the column Provided is a beam-to-column fitting having a pin that is locked to a member and prevents the tubular member from coming out of the column.

  In this joint fitting, the cylindrical member has a cross-sectional reduced portion at one end, the head of the bolt to be inserted is locked to the cross-sectional reduced portion, and the tip of the bolt is connected to the cylindrical member. Can stick out from. Then, by fixing the bolt to the beam, the cylindrical member can be fixed with the axis line vertical from the upper surface or the lower surface of the column. This cylindrical member is inserted into a hole provided in the axial direction from the end surface of the column, and is locked so as not to come out by a pin, so that the column and the beam are connected in the axial direction of the column via this joint fitting. It is joined so as to resist the tensile force.

  The cross-sectionally reduced portion of the cylindrical member is formed by drawing a metal cylindrical body, i.e., applying a radial force from the outside of the cylindrical body substantially evenly in the circumferential direction, thereby reducing the radius of the outer peripheral surface of the cylindrical body. It is formed by reducing. In this way, the process of forming the cross-sectionally reduced portion can significantly reduce the amount of work and lower the production cost compared to forming the bolt locking portion by welding the plate to the end of the cylindrical body. It becomes.

  In addition, when the cylindrical member is inserted into the hole provided in the axial direction from the end surface of the column, the cross-sectional reduction portion does not come into contact with the inner peripheral surface of the column hole due to the radius of the outer peripheral surface being reduced. . Therefore, the friction between the cylindrical member and the column is reduced, and the cylindrical member rotates with the column when the angle is adjusted around the axis of the column after the cylindrical member is inserted into the hole of the column. Is prevented. Thereby, the angle adjustment of the column becomes easy, and the pin for locking the tubular member to the column can be efficiently inserted.

  The invention according to claim 2 is a column-to-beam connection structure in which a wooden column and an end surface of the column are in contact with an upper surface or a lower surface of the beam and are bonded to each other. The cylindrical member is supported with its axis vertical, and the cylindrical member has a cross-sectional reduced portion whose cross-section is reduced by drawing at the end facing the upper surface or the lower surface of the beam. A bolt is inserted into the cylindrical member, the head is locked to the reduced cross-section inside the cylindrical member, and the tip of the bolt protruding from the end face with the reduced cross-section of the cylindrical member is attached to the beam A pin inserted into a hole provided in an axial direction from an end surface of the column, and inserted into a lateral hole provided substantially perpendicular to the axis of the column from a side surface of the column. However, the tubular member is engaged with the tubular member so as to prevent the tubular member from coming out of the column. There is provided a beam-column joint structure being.

In this joining structure, since the tip of the bolt protrudes from the tubular member of the joint fitting and is fixed to the beam, the tubular member of the joint fitting is firmly fixed in a state of projecting from the upper surface or the lower surface of the beam. And a cylindrical member can be made to contact | abut to the upper surface or lower surface of a beam by fitting a cylindrical member in the hole provided in the end surface of the column. Thereby, the compressive force of the column is transmitted from the end surface of the column to the beam.
In addition, when a tensile force acts on the column, the engaging pin penetrated from the side surface of the column penetrates the column and the joining bracket. Is transmitted. On the other hand, the head portion of the bolt inserted into the tubular member is locked to the cross-sectionally reduced portion of the tubular member, so that the pulling force is transmitted from the tubular member of the joint fitting to the bolt. Furthermore, the pulling force is transmitted from the bolt to the beam by fixing the tip of the bolt to the beam. Therefore, the force is reliably transmitted from the column to the beam via the joint fitting with respect to the tensile force.
And the cylindrical member of the said joining metal fitting has the cross-sectional reduction part in which the head part of a volt | bolt is latched formed by drawing, and it can reduce the manufacturing cost of a joining metal fitting as demonstrated about Claim 1. In addition, it is possible to improve work efficiency when joining columns and beams.

  According to a third aspect of the present invention, a screw member having a spiral projecting portion on the outer periphery is screwed into the beam in the vertical direction, and the screw member has an end face exposed on the upper surface or the lower surface of the beam. The screw hole provided in the axial direction of the screw member is formed, and the tip end portion of the bolt is screwed into the screw hole of the screw member and fixed. A beam-to-column connection structure is provided.

  In this joining structure, since the tip end portion of the bolt protruding from the tubular member of the joining fitting is fixed to the screw member screwed into the beam, the joining fitting can be securely fixed to the beam. And the tensile force and the compressive force transmitted from the column are distributed and act on the wide range of the cross section of the beam via the screw member.

  As described above, in the joint structure using the beam-column joint structure according to the present invention or the beam-column joint bracket according to the present invention, it can be configured to effectively resist the force of pulling out the column. Efficient work is possible. Further, it is possible to reduce the cost for forming the joint between the column and the beam.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic perspective view showing an example of a structure of a wooden building that can suitably use a column beam joint structure according to the present invention.
This structure is formed by combining a plurality of rigid frame structures in which a wooden beam 1 and a main column 2 are coupled so that a rigid coupling, that is, a bending moment is transmitted. The cross-sectional shape of the main column 1 and the beam 2 is a flat shape in which the cross-sectional dimension is large in a direction parallel to the vertical plane including the axis of the rigid frame and the cross-sectional dimension is small in a direction perpendicular to the vertical plane. ing. Therefore, this rigid frame structure is used as a member that effectively resists bending moment and shearing force acting in the vertical plane including the axis, and a plurality of such unidirectional rigid frames are combined in different directions to form a three-dimensional structure. A typical structural enclosure.

  Each of the rigid frame structures has a so-called beam-winning structure in which the lower surface of the beam 2 is in contact with and joined to the upper end surface of the main column 1, and the rigid frame structures in different directions are joined to the side surface of the beam 2a. The end face of the beam 2b of the rigid frame structure is abutted and coupled.

  The rigid frame structure mainly bears the load in the vertical direction on the main column 1, but when the span length of the beam 2 is large, the shaft column 3 is provided between the main column 1 a and the main column 1 b. It is done. In addition, the axial column should be used even in a portion where the axial tensile force acts on the column at the tip and rear of the portion where the beam 2a projects in a cantilever manner, or a portion where it is not necessary to resist the bending moment between the column and the beam. Can do. That is, the axial column 3 is not expected to resist the bending moment, and supports the load in the vertical direction by the axial force and reduces the bending moment of the beam 2.

FIG. 2 is a schematic perspective view showing a joint structure between a lower-layer beam 2a and an upper-layer shaft column 3 used in the frame structure shown in FIG. 1, and FIG. 3 is a cross-sectional view of the same joint structure. In addition, this joining structure is one Embodiment of the invention which concerns on Claim 2 of this application, and the column beam joining metal fitting used by this joining structure is one Embodiment of the invention which concerns on Claim 1.
In this joining structure, the axial column 3 is erected on the beam 2a at a position where the first beam 2a and the second beam 2b of the rigid frame structure are joined. The first beam 2a and the second beam 2b are joined using screw members 4a and 4b screwed in the vertical direction of the respective beams, and the second beam 2a and the second beam 2b are joined to the side surface of the first beam 2a. The end surface of the beam 2b is abutted and joined.

  As shown in the plan view, the front view, and the side view of FIG. 4, the screw member 4 is provided with a spiral projecting portion 41 on the outer peripheral surface of a rod-like metal member, and is screwed in the axial direction from the upper end surface. A hole 42 is provided. Further, a lateral hole 44 is provided in the middle portion in the length direction in a direction perpendicular to the axis, and in the first screw member 4a screwed into the first beam 2a, a female screw is cut on the inner peripheral surface of the lateral hole 44. Has been. Further, the lateral hole of the second screw member 4b screwed into the second beam 2b has a smooth inner peripheral surface so that the pin can be inserted.

  A plurality of bolts 5 are screwed into a lateral hole of the first screw member 4a screwed into the beam from the side surface of the first beam 2a. 6 is attached. The projecting plate portion 61 of the beam joint 6 is inserted into the slit 21 provided at the end of the second beam 2b, and the pin 7 penetrating the second screw member 4b from the side surface of the second beam 2b is formed. It is locked to this beam joint fitting 6. Thereby, the first beam 2a and the second beam 2b are joined so as to be able to transmit a vertical force, that is, a shearing force of the beam.

As shown in FIG. 3, a column beam joint fitting 8 for joining the shaft column 3 is attached to the screw hole 42 provided in the axial direction from the upper end surface of the first screw member 4a. As shown in FIG. 5, the column beam joining bracket 8 includes a cylindrical member 81 and a bolt 82 inserted in the cylindrical member 81, and the end of the cylindrical member 81 on the column end surface side has a cross section. A reduced portion 81a is formed. The cross-sectional reduced portion 81a is formed by gradually reducing the cross-section from the cylindrical portion 81b to the end face side of the column, and the inner diameter of the cross-sectional reduced portion 81a is smaller than the outer diameter of the bolt head 82a. ing. Accordingly, the head portion 82 a of the bolt is locked in the cylindrical member 81, and the tip end 82 b of the bolt protrudes outward from the end surface of the cylindrical member 81.
On the other hand, a circular through hole 81c is provided in a direction perpendicular to the axis from the side surface in the vicinity of the end opposite to the end where the cross-section reducing portion 81a of the cylindrical member 81 is provided.

  The tubular member 81 is obtained by cutting a steel pipe member into a predetermined length and drawing one end portion of the pipe member to form a reduced cross-sectional portion 81a. Therefore, the cylindrical member 81 can be manufactured at a low cost with a small number of steps.

  The cylindrical member 81 is fixed by screwing the bolt 82 into the screw hole 42 provided in the upper end surface of the first screw member 4a, and the lower end surface is in close contact with the upper end surface of the first screw member 4a. And are joined with the axis line vertical.

  On the other hand, a hole having a circular cross section corresponding to the outer diameter of the cylindrical portion 81b on which the cylindrical member is not drawn is provided in the lower end surface of the shaft column 3 in the axial direction. And the cylindrical member 81 is accommodated in this hole, and the axial column 3 is joined so that an end surface may contact | abut to the upper surface of the beam 2a. From the side surface of the shaft column 3, the pin 9 is inserted into the lateral hole 31 provided in advance, and is inserted into the through hole 81 c provided in the side surface of the cylindrical member 81, so that the shaft column 3 and the cylindrical member 81 are connected. It is locked by a pin 9. Therefore, when a force in the direction of pulling out the shaft column 3 from the beam 2a is applied, the pulling force is transmitted to the cylindrical member 81 locked to the shaft column 3 by the pin 9, and the beam is transmitted through the bolt 82 and the screw member 4a. 2a. This reliably resists pulling out. Further, even when a shearing force acts on the lower end of the axial column 3, the shearing force is reliably transmitted from the axial column 3 to the beam 2a via the tubular member 81, the bolt 82, and the screw member 4a. The joint with the beam 2a can resist the horizontal force during an earthquake or the like.

Next, the process of joining the axial column 3 and the beam 2 will be described.
At the processing stage in a factory or the like, a vertical through hole is provided in the beam 2a and the screw member 4a is screwed. The screw member 4a is provided with a horizontal hole 44 for attaching the beam joint metal fitting 6. The direction of the horizontal hole 44 can be accurately screwed with the bolt 5 for fixing the beam joint metal fitting 6. Set.

  After building the beam 2a at the site where the building is constructed, as shown in FIGS. 6 (a) and 6 (b), a bolt 82 is screwed into the screw hole 42 provided in the end face of the screw member 4a to form a tubular member. 81 is fixed. At this time, the wrench 10 is inserted from above the cylindrical member 81 and the bolt 82 is rotated. Thereafter, as shown in FIGS. 7A and 7B, the shaft column 3 is supported above the fixed tubular member 81, and is tubularly formed in the hole 32 provided in the axial direction from the end surface of the shaft column 3 in advance. The shaft column 3 is lowered so that the member 81 can be fitted. Then, the end surface of the axial column 3 is brought into contact with the upper surface of the beam 2a.

  Thereafter, the shaft column 3 is rotated about its axis so that the direction of the horizontal hole 31 provided in the shaft column and the direction of the through hole 81c provided in the tubular member of the joining metal fitting coincide with each other, and the pin 9 is inserted. The direction of the horizontal hole 31 is adjusted. At this time, since the cross-sectional reduced portion 81a of the cylindrical member is not in contact with the inner peripheral surface of the hole 32 provided in the shaft column 3, the friction generated between the cylindrical member 81 and the hole 32 is slight, The cylindrical member 81 does not rotate together and can be adjusted easily. Then, the pin 9 is inserted into the lateral hole 31 from the side surface of the shaft column 3 and is inserted through the through-hole 81 c provided in the shaft column 3 and the tubular member 81. Thereby, the axial column 3 and the cylindrical member 81 are locked by the pin 9, and the cylindrical member 81 is fixed to the screw member 4a by the bolt 82. Therefore, the beam 2a and the shaft column 3 are joined so as to be resistant to a horizontal force and a force for pulling out the shaft column 3.

  The embodiment described above is a joint structure between the beam 2 and the shaft column 3 supported thereon, but the same configuration is applied to the joint portion between the shaft column and the beam supported thereon. be able to. In this case, the bonding structure is obtained by inverting the above structure upside down. In the joining process, the beam having the cylindrical member fixed on the upright shaft column is supported, and the cylindrical member is fitted into a hole provided below from the end surface of the shaft column, and the lower surface of the beam is columned. It abuts on the upper end surface.

  Moreover, in the said embodiment, although the front-end | tip part of the volt | bolt which protruded from the cylindrical member was fixed by screwing in a screw member, it is screwed and fixed to the other member fixed to the beam. As shown in FIG. 8, the bolt 83 may be inserted into the cylindrical member 81, and the beam 2 a may be passed through and fixed with a nut 85. At this time, it is desirable to insert a washer 84 in a portion where the tubular member 81 is abutted against the beam 2a.

It is a schematic perspective view which shows the structure of the wooden building in which the column beam junction structure concerning this invention is used suitably. FIG. 2 is a schematic perspective view showing a beam-to-column connection structure which is a structure for joining a beam and a shaft column of the structural frame shown in FIG. 1 and is an embodiment of the invention according to the present application. It is sectional drawing of the column beam junction structure shown in FIG. FIG. 4 is a top view, a front view, and a side view of a screw member used in the column beam connection structure shown in FIGS. 2 and 3. FIG. 4 is a plan view, a front view, a bottom view, and a cross-sectional view showing a beam-column joint used in the beam-column joint structure shown in FIGS. 2 and 3. It is the schematic which shows the process of joining a pillar and a beam by the beam-column joining structure shown in FIG.2 and FIG.3. It is the schematic which shows the process of joining a pillar and a beam by the beam-column joining structure shown in FIG.2 and FIG.3. It is a schematic sectional drawing which shows the column beam junction structure which is other embodiment of this invention. It is sectional drawing which shows the conventional column beam junction structure.

Explanation of symbols

1: main column, 2: beam, 3: axial column, 4: screw member, 5: bolt, 6: beam joint, 7: pin, 8: column beam, 9: pin, 10: wrench,
21: slit provided at the end of the beam, 31: lateral hole, 32: hole,
41: Spiral wing body, 42: Screw hole, 44: Side hole,
81: Cylindrical member, 81a: Reduced cross section, 81b: Cylindrical part, 81c: Through hole, 82: Bolt, 82a: Head of bolt, 82b: Tip of bolt, 83: Bolt, 84: Washer

Claims (3)

A beam-to-column fitting for joining wooden columns and beams,
A cylindrical member inserted into a hole provided in an axial direction from the end surface of the column, and having a cross-sectional reduced portion whose cross-section is reduced by drawing at the end on the end surface side of the column;
A bolt whose head is locked to the reduced cross-section portion inside the cylindrical member, and a tip portion protruding from the end surface of the column is fixed to the beam,
The cylindrical member is inserted from a side surface of the column into a horizontal hole provided in a direction substantially perpendicular to the axis of the column, and is latched by the cylindrical member inserted into the hole of the column, so that the cylindrical member comes out of the column. A beam-to-column fitting having a pin for preventing the above. It is a column-to-column connection structure in which a wooden column and an end surface of this column are in contact with the upper surface or the lower surface of the beam,
Opposed to the upper or lower surface of the beam, a metal cylindrical member is supported with its axis vertical,
The cylindrical member has a cross-sectional reduced portion whose cross-section is reduced by drawing at an end portion on the side facing the upper surface or the lower surface of the beam,
Bolts are inserted into the cylindrical member, and the head is locked to the reduced cross section inside the cylindrical member,
The tip of the bolt protruding from the end face with a reduced cross section of the cylindrical member is fixed to the beam,
The cylindrical member is inserted into the hole provided in the axial direction from the end surface of the column,
A pin inserted into a lateral hole provided in a direction substantially perpendicular to the axis of the column from the side surface of the column is locked to the cylindrical member so as to prevent the cylindrical member from coming out of the column. Column beam connection structure characterized by having. A screw member having a spiral projecting portion on the outer periphery is screwed into the beam in the vertical direction,
The screw member has a screw hole formed in an axial direction of the screw member from an end surface exposed on the upper surface or the lower surface of the beam,
The column beam connection structure according to claim 2, wherein a tip portion of the bolt is fixed by being screwed into the screw hole of the screw member.

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